Elastic-fluid turbine.



J. A. MAcMURCHY.

ELASTIC FLUID TURBINE.

APPLlCATiON FILED AUG-251 1913.

1,21 @1915 P11611161 Ja11.16,1917.

1 I I I Mu BY /N VENTOR.

IS ATTORNEY IN FACT.

J. A MACMURCHY- ELASHC FLUID TURBINE.

APPLICATION mm Aumzs. I913.

Lmg wfi Patented Jan.16,1917.

2 SHEETSSHEET 2.

f INVEN TOR.

,, H/S ATTORNEY IN FACT JOHN A. MAGMURCHY OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO THE WEST- INGHOUSE MACHINE COMPANY, A CORPORATION OF PENNSYLVANIA.

ELASTIC-FLUID TURBINE.

Specification of Letters Patent.

* rammed Jan. in, 11917.

Application filediAu' gust 25, 1913. Serial No. 786,494.

To all whom it may concern Be it known that LJon'N A. MACMURCHY, a subject of theliing of Great Britain and Ireland, and a resident of Vilkinsburg, in

the county of Allegheny and State of Penn-' bines.

An object of the invention is to provide a new and improved stator or turbine casing in which means are employed for simplifying and cheapening the operation of manufacturing the casing, erat-ion of assembling the separate parts of the turbine.

- A' further object is to produce a turbine casing in which means are employed for eliminating difficulties ordinarily encountered in the casings of large. turbines, and also for facilitating the operation of inspecting the interior of the turbine and of making necessary repairs within the working passages of the turbine.

These and other objects I attain in a turbine embodying the features herein described and illustrated in the drawings accompanying and forming'a part of this application.

lln-the drawings: Figure 1 is a fragmental sectional view of a turbine embodying my invention; and Fig. 2 is a sectional view of the turbine taken along the line 22 of Fig. 1 and looking in the direction of the arrows.

The turbine illustrated as an embodiment of my invention comprises a rotor 3, a stationary casing 4, which surrounds the rator, and internal rings 5 and 6, which are mounted on the casing and cooperate with the rotor in inclosing fluid passages of the turbine. As illustrated, the casing 4 is substantially cylindrical and is divided, as is customary, on the horizontal plane passing through the axis of the rotor 3, thereby forming upper and lower portions, WhlCh may be termed the top and bottom of the casing. The casing is also of simple construction, since it is formed throughout its length of metal of approximately the same thickness, and consequently it is not subject in the same degree to the temperature and also the op-' strains encountered in casings of a massive construction which vary greatly in crosssection. The casing illustrated is provided on its inner face with circumferentially extending shoulders 7 and 8 adapted to be employed inmounting the respective internal cylinders 5 and 6.

Each cylinder is formed in semi-circular sections so that each section may be secured to either the upper or lower portion of-the turbine casing before thetwo parts of the casing are assembled or secured'together.

Each cylinder is provided on its outer or concave face with an annular flange or extension 9, which inturn is provided on its outer edge with a projecting shoulder 10, adapted to engage a lateral face of one of the shoulders formed on the casing, and to be'drawn into gripping engagement with the shoulder by means of a clamp ring" 11. Each clamp ring illustrated is formed in semi-circular sections and is mounted on th flange 9 of one of the internal cylinders so that the line of division between its sections coincides with the line of division between the sections of' the cylinder. Any suitable means, such for example as bolts 12, which pass through the ring and are threaded into the flange of the cylinder, may be employed in mounting the ring on the flange 9 and in drawing it up into gripping engagement with one or the other of the 00- operating shoulders 7 or S of the casing. The internal cylinders 5 and 6 are preferably so mounted on the casing that the line of division between the separate'sec- 'tions coincides with the line of division of the casing; or in other words, one half-sec- ,tion of each internal cylinder is mounted on one section of the casing, while the other half-section is mounted on the other section of the casing. The clamp rings 11 may be centered either on the casing or on their mounting'cylinders, and each-cylinder is preferably centered on the cylindrical or inner face'ofthe casing shoulder with which it cooperates. It will be understood, how ever, that any other suitable means may be employed for centering the cylinders with relation to the casin and the rotor. v

In the drawings, have shown a turbine equippedwith a vane-carrying internalicylinder and an internal cylinder which is adapted to cooperate with the rotor elements .in forming a fluid packing. The cylinder 5 from one chamber within the casing to another. The cylinder 6 illustrated may be provided with two sets of ribs or projections 1'5 a nd may therefore be employed in forming two separate packings, which may be spaced apart and may also be of different diameters. In fact the cylinder 6 illustrated is of the form ordinarily employed in forming two. separate packings, but is shown broken away for convenience of illustration. With such a construction, the cylinder 6,

in conjunction with the rotor, incloses an annular chamber 17 which may be employed in connection with a dummy or balance piston as a counter-balancing chamber. The

' separate. sections of the internal cylinders are shown secured together by means of ta 'pered bolts 18, but it will he understood that any other suitable means may be emp oy The operation of mounting each internal cylinder in place on the casing consists first,

in so locating the separate sections that the flange 9 engages one of the casing shoulders, and then in drawing up the clamp ring 11, by means of the bolts 12, so that the casing shoulder is gripped between it and the shoulder 10. \Vith such a construction, the internal cylinders may be readily removed or replaced, and consequently the operation I of inspecting and repairing the interior passages of the turbine is greatly simplified. In addition tothis, the internal rings are firmly and securely mounted in place on the turbine casing, without the necessity of providing cylinder mounting holes in the casing.

In accordance with the provisions of the patent statutes, I have described the principle of operation of myinvention, together with an apparatus which represents what I now consider to be the preferred embodiment thereof, but I desire to have it understood that various changes, modifications,

Games at this patent may be obtainedv go:-

substitutions and omissions may ue made in the apparatus illustrated without departing from the spirit and scope of the invention, as set forth by the appended claims.

lVhat I claim is:

1. In a. turbine, a casing divided on a plane passing through the axis of the rotor inclosed therein, an internal cylinder cooperating with the rotor and divided in semi-circular sections, and clamping mear for remoyably securing each section of the internal cylinder to one of the sections of the casing.

2. In a turbine, an inclosing casing for the rotor of the turbine, an internal cylinder within the casing and surrounding the rotor, and means for remoyably clamping the cylinder to an in'iperforate part of the casin 3. In a turbine, an inc-losing casing for the rotor element of the turbine pro ided vwith a cylinder supporting shoulder on the inner face thereof, an internal cylinder mounted on said shoulder, and means for gripping said shoulder and for reinovably securing the cylinder thereto.

4. In a turbine, an inclosing casing for the rotor element of the turbine, having an internal annular shoulder formed thereon, an internal cylinder located within the casing and surrounding and cooperatii'lg with the rotor element, and a clamp ring mounted on the internal cylinder for engaging the shoulder and for remoyably mounting the cylinder on the casing.

5. In a turbine. an inclosing casing for the rotor of the turbine. having an impcrforate cylinderdnounting shoulder formed thereon. an internahcylinder located within the casing and surrounding the rotor. and means for clamping said cylinder to said shoulder.

6. In a turbine, an in'closing casing (livided on a plane passing through the axis of the rotor inclosed within the casing. an internal cylinder mounted on the casing and codperating with the rotor in inclosing working passages of the turbine. said cylinder being hvided in semi-circular halves, and means for clamping each half on a shoulder formed on the interior of the casing.

In testimony whereof I have hereunto subscribed my name this 21st day of August,

J OHN A. BLWMIIRCHY. lVitnesses C. IV. McGrInn, E. N. MCCALLIsTER.

five cents each, by addressingthe Commissioner 0! Patents, Washington, D. 0. 

